HP had some iPAQ smartphones and Google tells me Sharp also produced something (for Japanese market). But yes, many manufacturers didn't make their devices available worldwide, so it depends on market. In Russia we had lots of Qtek/HTC devices.
I had one of the "things sharp produced" that was actually released in the west. If it had a cellular modem in it and they still made it I would have never bought a smartphone.
HP had some iPAQ smartphones and Google tells me Sharp also produced something (for Japanese market). But yes, many manufacturers didn't make their devices available worldwide, so it depends on market. In Russia we had lots of Qtek/HTC devices.